Rabu, 27 Oktober 2010

Tak Pasti Merapi Masih Aktif Lagi

Krisis yang ditimbulkan oleh erupsi Gunung Merapi belum bisa dipastikan berakhir karena sebagian besar waktu kejadian erupsi yang bersifat eksplosif secara visual tidak terpantau karena kondisi lapangan berkabut dan gelap.

Demikian penegasan Kepala Pusat Vulkanologi dan Mitigasi Bencana Geologi, Badan Geologi, Surono, Selasa (26/10/2010), tentang peristiwa erupsi eksplosif Gunung Merapi, sebagaimana diperkirakan Surono sebelumnya.

Surono menyatakan belum bisa disimpulkan apakah proses erupsi ini sudah mencapai klimaks atau masih ada susulan lagi. ”Semuanya masih mungkin karena data aktivitas masih terus berlangsung. Namun, pemantauan terhambat gelap dan petugas pengamat yang kami perintahkan untuk turun menyelamatkan diri. Masa kritis belum bisa dipastikan berakhir,” katanya.

Hingga pukul 23.00, jumlah korban yang tewas 12 orang, termasuk seorang wartawan dari Vivanews.com, yakni Yuniawan Nugroho. Namun, menurut Bambang Kriwil, anggota tim SAR yang membawa turun kantong jenazah, diperkirakan masih banyak lagi korban tewas di Dusun Kinahrejo. Bahkan, diduga kuat Mbah Maridjan ikut jadi korban tewas.

Menurut anggota tim SAR lain, sebagian besar korban ditemukan di sekitar masjid milik keluarga Mbah Maridjan. Selasa malam, Sultan Hamengku Buwono X juga menyempatkan diri meninjau lokasi musibah di Kinahrejo, tetapi ia tidak bisa dihubungi. ”Beliau baru saja turun, Mas. Mungkin lagi repot. Saya pikir musibah ini sudah diantisipasi tetapi sebagian warga tidak mau dievakuasi,” ujar GKR Hemas, istri Sultan HB X.

Selasa sore, tiga dentuman besar letusan Merapi terjadi pada pukul 18.10, 18.15, dan 18.25. Letusan diawali suara gemuruh besar, sejak pukul 18.00 yang terdengar dari pos pengamatan Gunung Merapi di Jrakah (Kabupaten Magelang) dan Selo (Kabupaten Boyolali). Pengamat di Pos Selo melihat nyala api di puncak Merapi yang diikuti bumbungan asap berketinggian sekitar 1,5 kilometer.

Surono menyatakan belum mengetahui radius dampak awan panas yang menyertai letusan itu karena kondisi lapangan berkabut dan gelap. Ia memastikan, dengan tiga kali dentuman itu, erupsi Merapi bersifat eksplosif, bukan efusif seperti pola biasanya. ”Erupsi ini juga lebih besar dari tiga erupsi Merapi sebelumnya.”

Menurut Surono, salah satu parameternya adalah durasi awan panas yang jauh lebih lama dari erupsi tahun 2006. Pada erupsi tahun 2006, menurut Surono, awan panas hanya berlangsung paling lama 7 menit. Sekarang lebih dari 30 menit.

Dusun Mbah Maridjan


Bambang Kriwil melaporkan, kondisi terakhir Dusun Kepuhharjo, Umbulharjo, Cangkringan, terisolir karena tertutup abu vulkanik setinggi 5 sentimeter. Dusun ini adalah dusun kediaman Mbah Maridjan (72), juru kunci Merapi.

Kondisi desa juga sunyi senyap karena lampu listrik mati, pohon-pohon bertumbangan, disapu lahar dan awan panas. Sejumlah rumah juga rusak karena tertimpa pohon tumbang dan terbakar akibat lahar panas.

Mbah Maridjan diketahui sejak sore bertahan saat letusan Merapi terjadi. Sebelum letusan ia tengah shalat maghrib dan menolak dievakuasi meski gemuruh dari arah Merapi dan kabut sangat tebal menutupi. ”Dulu-dulu memang selalu mendung dan kabut seperti ini pas Merapi njeblug. Ora tau dibuka, ditutup terus (tidak pernah dibuka, ditutup terus),” kata Mbah Maridjan kepada sejumlah wartawan.

Letusan dan awan panas

Letusan Gunung Merapi terjadi sekitar 35 jam sejak statusnya dinaikkan menjadi Awas. Letusan eksplosif gunung di perbatasan DI Yogyakarta dan Jawa Tengah (Jateng) itu diikuti hujan abu yang meluas. Satu korban meninggal, belasan lainnya dirawat karena luka bakar parah.

Dari data kronologi Balai Penyelidikan dan Pengembangan Teknologi Kegunungapian (BPPTK) Badan Geologi di Yogyakarta, yang ditandatangani Surono, fase awal erupsi ditandai munculnya awan panas (wedhus gembel) pukul 17.02 dengan durasi sembilan menit.

Luncuran pertama diikuti lima luncuran awan panas berdurasi 2-5 menit dan dua awan panas besar pada pukul 17.42 selama 33 menit dan 18.21 selama 33 menit. Arah luncuran terpantau ke sektor barat-barat daya dan sektor selatan-tenggara. Gelombang awan panas itu mereda pukul 18.54.

Pada saat itu juga, BPPTK memerintahkan seluruh petugas di lima pos pemantau Gunung Merapi mengevakuasi diri karena dampak letusan bisa mengarah ke segala arah.

Sampai Selasa malam, pencarian dan evakuasi korban masih dilakukan. Semalam, tujuh pasien luka bakar dibawa ke RS Panti Nugroho, Sleman. Empat di antaranya dirujuk ke RS Dr Sardjito. Di Rumah Sakit Bethesda terdapat dua pasien luka bakar. Mereka adalah pasien rujukan RS Grhasia, Pakem.

English Version

The crisis caused by the eruption of Mount Merapi ended unclear because most of the time the event explosive eruptions are not observed visually because of foggy and dark field conditions.

Thus the assertion Head of Volcanology and Geological Hazard Mitigation, Geological Agency, Surono, Tuesday (10/26/2010), about the events of explosive eruption of Mount Merapi, as estimated previously Surono.


Surono states can not be concluded whether this eruption process has reached a climax or more aftershocks are still there. "Everything is still possible because the data are still ongoing activity. However, monitoring is hampered dark and observers that our officers ordered to go down to save themselves. Critical period can not be ascertained over, "he said.


Until 23:00, the number of victims killed 12 people, including a reporter from Vivanews.com, namely Yuniawan Nugroho. However, according to Bambang Kriwil, SAR team members who bring down a body bag, it is estimated there are many more people killed in the hamlet of Kinahrejo. In fact, Mbah Maridjan allegedly involved so the death toll.


According to another SAR team members, most of the victims were found around the mosque a family owned Mbah Maridjan. Tuesday night, Sultan Hamengkubuwono X also taking the time to review the location of the disaster in Kinahrejo, but he could not be contacted. "He just fell, Mas. Perhaps more troublesome. I think this tragedy has been anticipated but some residents do not want to be evacuated, "said GKR Hemas, the wife of Sultan HB X


Tuesday afternoon, three big bang Merapi eruption occurred at 18:10, 18:15, and 18.25. The eruption started a big rumble, since at 18:00 the sound of the observation post at Merapi volcano whole observatories (Magelang regency) and Selo (district Boyolali). Observers in Post Selo saw flames at the top of Merapi, which followed the smoke bumbungan altitude of about 1.5 kilometers.
 

Surono states not yet know the radius of the impact of hot clouds that accompanied the eruption because of foggy and dark field conditions. He made sure, with three times the bang, the explosive eruption of Merapi, not effusive as usual pattern. "This eruption was also larger than the previous three Merapi eruption."
 

According to Surono, one of the parameters is the duration of the hot cloud is much longer than the 2006 eruption. In the eruption of 2006, according to Surono, hot clouds only lasted no more than 7 minutes. Now more than 30 minutes.
 

Hamlet Mbah Maridjan
Bambang Kriwil reported, the last condition Hamlet Kepuhharjo, Umbulharjo, Cangkringan, isolated as it is covered volcanic ash as high as 5 centimeters. This Hamlet is a hamlet residence Mbah Maridjan (72), caretaker of Merapi.
 

The condition of the village also quiet because of power failure lights, trees falling, lava and hot clouds swept. Several houses were also damaged by a falling tree and caught fire due to hot lava.
 

Mbah Maridjan known since last evening when the Merapi eruption occurred. Before the eruption he was evacuated maghrib prayer and refuse even the roar from the direction of Merapi and very thick fog cover. "First-past was always overcast and fog like this fit njeblug Merapi. Ora tau opened, closed and hold (never opened, closed and hold), "said Mbah Maridjan told reporters.
 

Eruptions and pyroclastic
Mount Merapi eruption occurred about 35 hours since its status was raised to Awas. Explosive eruption of the mountain on the border of Yogyakarta and Central Java (Central Java) was followed by widespread rain of ash. One victim died, dozens of others were treated for severe burns.
 

From the data chronology Investigation and Technology Development Center Kegunungapian (BPPTK) Geological Agency in Yogyakarta, which was signed Surono, the early phase of eruption marked the emergence of hot clouds (wedhus trash) at 17:02 with a duration of nine minutes.
 

The first slide was followed five hot clouds glide duration of 2-5 minutes and two large hot cloud at 17:42 for 33 minutes and 18:21 for 33 minutes. Glide direction to the sector tracked west-southwest and south-southeast sector. Cloud heat wave subsided at 18:54.
 

At that moment, BPPTK ordered all officers in the five post monitoring Mount Merapi eruption evacuating themselves because of the impact could lead to all directions.
 

Until Tuesday night, search and evacuation of casualties is still done. Last night, seven burn patients were taken to Panti Nugroho, Sleman. Four of them were referred to Dr Sardjito. Bethesda Hospital there are two burn patients. They are patient referral hospitals Grhasia, Pakem.